A calciphile plant is a plant that grows exclusively in soils rich in calcium carbonates, in other words in calcareous soil.
This type of plant is therefore also a basiphile and, often, xerophile.
The presence of calciphile vegetation is therefore an indicator of the nature of the soil.
Dry, calcareous meadow rich in orchids: a typical calcareous soil environment. © Didier Bier CC by-sa 2.0